@article{AL_2009_48_3_a0,
     author = {V. V. Bludov and V. M. Kopytov and A. H. Rhemtulla},
     title = {Normal relatively convex subgroups of solvable orderable groups},
     journal = {Algebra i logika},
     pages = {291--308},
     publisher = {mathdoc},
     volume = {48},
     number = {3},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2009_48_3_a0/}
}